29551 Views Previous 1 2 3 4 5 6 Next 81 Replies Latest reply: Aug 11, 2010 6:27 AM by kwikeeguy Go to original post
This bug really suck!
My Samsung 223BW was only working fine with MacOS 10.5.
This problem had appear when I first installed Snow Leopard.
I had a workaround to be able to use 1680 x 1050 but it was just annoying.
Since I've installed 10.6.3 it does not work anymore at all!
Impossible to find a MacOS specialist to find help...
Same sort of problem with a SyncMaster 2243. Resolution is fine, but screen keeps on cutting out and going black as if the display has gone to sleep. Fortunately tried this out on my son's MacBook before I'd had the chance to warn him not to download the update. I use this external monitor all of the time so will wait before I update.
After upgrading to 10.6.3 my external monitor showing "glitches" too. Then the system would freeze up. Sometimes both screens would go completely white. Sometimes one would go black. At one point, my primary screen was fine (external) but the imac's screen would go black. I was able to change resolution and it came back. But system would still freeze eventually. I unplugged my external monitor and things were fine for several hours. Just now my imac's screen just went black, but my itunes music was still going, so the computer wasn't frozen, just he video cut out.
I decided to remote in with Screen Share via my ibook to see if it would show the desktop and maybe I could try to change the screen res and get my machine back, but it just showed a black screen as well, forcing me to hard reboot and lose work.
Just to update.
I popped in the Snow Leopard disc, rebooted and clicked install. 40 minutes later I'm back on 10.6.0 and a working iMac again. With 10.6.3 I was at a point my machine was freezing/breaking every time it got to the desktop. Now I'm updating to 10.6.2 with my external monitor plugged in with zero screen glitches. Everything is working fine again.
Hi ... thanks everyone for the heads up. I just cloned my HD (I use SuperDuper) and will try the upgrade to 10.6.3 this weekend (after I download the incremental installer) and let you know later whether it had glitches for the larger screen size (I have 26" Samsung Syncmaster running nicely at 1920x1200 on an old MBP17" that was fixed on the video issue recall.) Happy Easter....
I'm having the same issue with my LCD 32" LG tv over here. Stopped synchronizing IMMEDIATELY after I updated my Mac last night. I'm not sure if it's because of the cable was plugged into the tv while my Mac was updating or of because of the update itself (as it seems to be acc to this thread).
Will reinstall the update and see if that helps or go back to 10.6.2.
I've had some issues before with my LG so let's see how this turns out.. have never had any issues with Apple before actually but if it's their fault, I surely hope they will fix it asap.
Alright got back to 10.6.2 and now my tv and mac is synchronized.
There is something about this update that makes the sync work because neither of these updates didn't work with my LCD tv from LG:
My model is 32LB2R btw.
***? This is very odd.. what is it with 10.6.2 that makes it work but not the previous ones?
Is there any Administrator here ?
Basically, you are talking to other Apple users, not to Apple.
If you want to contact Apple directly, click on the "Contact Us" link at the bottom of every page & check out your options.
Update worked fine to 10.6.3 ; Running my 26" monitor with no issues on that or any other issues. Also did the same to my Macbook (which typically never has video issues because of the hardware).
FWIW I used the downloaded incremental updater (not the combo, but not the one through Software update either). Booted first into safe mode after the cloning. Then did the update, then also updated some of the other offers (iPhoto and iTunes) to bring the system up to date and ran repair permissions twice before it was all clean... no issues at all (even runs Eudora nicely still).
Yes it is a Samsung (see previous post further up) with an MBP that was eventually part of Apple's exceptional video transplants. It was within the recall period but passed all the Apple tests, except about a year ago with one of the Leopard upgrades my computer plus a few 100 hundred others (documented) crashed spectacularly and were then given free motherboards and video card replacements after Apple determined it was a replicable but rare issue associated with the NVIDIA GeForce 8600 card that came under their recall. They replaced mine free (and others) even though it was no longer under warranty or under AppleCare. This occurred only with the MBP. Since then my video has been fine, fast, cool and operating as advertised. The switch to 10.6.3 was painless (but not necessarily quick ... I took many precautions [like cloning and then verifying the clone] before switching.)
Whoops just looked at the model number it is Samsung 245B so I suppose it is 25inches instead of 26.
After 10.6.3 I have similar problems with two different external monitors, both connected by DP->DVI adapter. One is a Samsung 2343bwx (2048x1152), the other is a NEC 2070NX (1600x1200). Flickering, moving vertical lines, shaky picture etc., usually after waking from sleep with the external display attached. But it's not as serious as what you're experiencing, as I can make it go away after a few on/off cycles of the display, or a system restart - that gives me full use of the max resolution back.
For some (but unfortunately not all) of those having monitor problems, one of the following suggestions may help:
• If your monitor has any special features, especially automatic setup or other 'smart' ones like on-the-fly dynamic color or contrast correction, see if there is a way to turn off or reset them. Unfortunately, some manufacturers have started adding features more suited to their HDTV's to their computer monitors as well, & this can cause unexpected results. For example, Samsung's "MagicBright" technology adjusts brightness and gamma frame by frame, which is great for optimizing full screen HDTV pictures, but could conceivably cause flickering or weird color shifts with more typical computer multi-windowd display content or make stable monitor calibration impossible.
• Related to the above, many monitors store different display profiles for each different resolution they detect coming from the source. The threshold for what constitutes a different resolution varies by manufacturer & model line, so even changes more subtle than the obvious pixel resolution & scan rate selections you see in Display Preferences can trigger some monitors to create a new profile, one that may need to be calibrated all over again. (This applies both to the Display Preference Color > Calibrate feature & to any image controls on the monitor itself.)
• Especially with VGA connections, the order of powering up the monitor & computer or connecting the two may change how they interact, including the available resolutions. This is because the protocols the monitor & graphics card use to exchange information about the monitor's display capabilities vary by connection type & how the monitor implements the protocol, especially when it is not powered up or in a power saving mode. Usually, the "Detect Displays" feature of Display Preferences will set things right, but some monitors don't seem to respond to this correctly once it is displaying some resolution.
• If the monitor has several different kinds of inputs like a standard 15pin VGA connector plus DVI-D or HDMI ones, check the manual for any restrictions on the kind of signals or resolutions one or another might have, or for any of those automatic or 'smart' variations mentioned above that might apply. It may simply be that something about the 10.6.3 (or a previous) OS version has caused the monitor to decide the input from the Mac required a new profile & it created one with settings other than what you expect, & it may do this for each input differently.
Basically, what I'm saying is that the 'smart' features of some monitors can cause problems after an OS update because they change the monitor's behavior without any obvious indication that they have done so, other than that they don't work like they did beforehand. If you are aware of this possibility it may help you determine if you can get the monitor working with 10.6.3 yourself or if you will have to wait for some fix from Apple.